Attachment for telephone-transmitters.



E. M. SGHOLLENBERGER. ATTACHMENT FOB TELEPHONE TRANSMITT'ERS.

APPLICATION FILED SEPT. 12, 1912.

Patented Sept. 9, 1913.

any of any desirable configuration, and constructed in an "hollow tion and comprises two sections 10, ,11 each UNITED STATES PATENT OFFICE.

EDMUND M. 'SCHOLLENBERGEB, or omens-o, ILLINOIS, assreuon or ONE-HALF To LEE A. STAHL, or cmcaeo, ILLINOIS.

n'r-mcnmnur FOB rstnrnonn-rnausmrrrnns.

Specification of Letters Patent.

Application med September 12, 191;. Serial No. 719,958.

To all whom it may concern:

Be it known that LEDMUND M. SCHOL- nannnizenn, a citizen of'the United States, residing at Chicago, in the county of Cook and the State of Illinois,- have invented oer; 'ta' .its use In connection with telephone transmitters, and one of the objects of the invention is'to provide an improved attachment of this class whereby a clear and distinct sound will be delivered to the transmitter, while at the same time the message when spoken into the attachment, in the ordinary or a lower tone, cannot be heard by another person in the same room.. v

A further object is to provide .an improved device of this class which will be simple, durable, cheap and light in construction, readily attached and detached and which will be efi'ective and efiicient in operation.

To the atta-inment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating the invention and in which,

Figure 1 is a perspective view of an improved attachment of this class contructed m accordance with the principles of this invention and showing the same attached to a telephone transmitter. Fig. 2 is a longitudmal, sectional view of the. attachment.

Referring mpre particularly to the drawing, the attachment may be constructed of desired size and material and may be sifitable manner. In the present exemp ification of this invention theattachment is shown in the formof a body which is of sectional construcof which is in the form of a hollow cone and at the apex of the respective c'ones 10, 11, openings 12 13 are formed. At the base of he cone 10 a flange 14 is formed and this flange is arranged at an angle to the remaining portion of the cone and may be of any desired width. A similar flange 15 is orm'ed 't the base of the other cone section ll and is adaptedto receive the flange 14: of the section 10. The two sections 10 and 11 thus formed may be detachably secured together any desired or suitable manner so that they can be separated to permit the attachment to be secured to the transmitter and also for cleaning. A suitable means for thus securing the sections together comprises a bayonet slot being carried by one of the sections while the cooperating projection or lug is carried by the other section.

A mouth piece 17 of any desired size and 'configuration is formed on the section 11 and around the opening 13. When the sec tions 10 and 11 are secured together, the openings 12 and 13 will be arranged op- .posite to and spacedfroni each other and thebody will increase in internal diameter from the apexes of the cones toward the longitudinal center of the body. Thus it will be seen that the sections 10 and 11 of the body may be readily separated and con nected and when connected the joint formed between the sections will be a close fit so as to confine the sound within the body. In

order to connect the attachment to the transmitter the sections 10 and 11 are separated and the mouth piece 18 of the transmitter-of the instrument designated generally by the reference numeral 19 is removed. After being removed the mouth piece is passed through the opening 12 of the section 10 tram the inside of the section and the ope g 12 is of a Patented Sept.9, 1913.

size less than the receiving cut of the mouth piece so that the mouth piece will not pass:

entirely through the opening as shown in Fig. 2. The mouth piece 18 is then aga n secured to the transmitter in the ordinary and usual manner. In order to support the section 10 projections 20 in the. form of arms or feet are provided on the section 10 and are adapted 'to rest against the face 100 plate of the transmitter 21. These arms or feet are of such a length that when the mouth piece 18 is seated with respect to the transmitter, they will be forced against the face of the transmitter owing to the fact that the enlarged end of the mouth piece will bind in the opening 12 and will draw the feet against the face plate, thereby holding the section 10 rigidly in position. If desired a suitable packing in the form of a gasket constructed of felt, rubber or the like may be provided to surround the mouth piece 18 adjacent to the opening 12 and to extend into the opening so as to form a tight joint. If desired a suitable fastening device 22 such as a screw or the like may be provided which passes through the wall of the section 10 and binds against the outer face of the mouth piece 18. When the section 10 is thus secured in position the section 11 may be readily attached to the section 10 by properly positioning with re' spect to the section 10 and then giving it a partial rotation to lock the bayonet joint. lhe body being of a light construction will be readily supported and held in position by the mouth piece 18 and the arms or feet 20, and the mouth piece 17 will be in a proper position for the-user.

lVith. this improved construction the user of the telephone by placing his mouth close to the mouth piece 17 can speak into the attachment and the sound will be transmitted to the transmitter through the mouth piece 18. Inasmuch as the conversation or the sound of the voice is confined within the attachment or body, it will be directed to the mouth piece 18 of the transmitter and a clear tone will be, the result. With this improved construction it is possible to carry on. a conversation in an ordinary tone which will not be'heard by another occupant of the same room. It is also possible to speak into the telephone with this attachment in a much lower tone than has heretofore been possible and at the same time be clearly heard by the person at the other end of the line.

While in the present cxemplification of this invention only one shape or form of the device is illustrated, it is to be understood that many changes may be i'nadein the sizes, shapes and proportions of the parts without departing from the spirit of the invention. This attachment also serves to correct a fault of a number of users of the telephone,

' that is, it prevents persons who are accustomcd to talking very loud, from placing the IllOllthtOo close to the transmitter thercby obviating the resulting objections from such a manner of using the telephone.

lt will be noted that the opening 13 is of a length greater than its width and that the annular flange 17 which surrounds this opening is of a similar shape so as to conform the transmitter passing through one ofthe openings from the inside of the casing, the last said opening being of a size less than the receiving end of the transmitter whereby the transmitter will fit snugly into the opening for supporting the casing, and a shield encompassing the other opening outside of and projecting a short distance beyond the casing.

2. A device of the class described, comprising a hollow casing having opposed reduced portions, each of which portions is provided with an opening therethrough and said casing being formed of sections secured together for separation, the mouth piece of the transmitter passing through one of the openings from the inside of the casing, the last said opening being of a size less than the receiving end of the mouth piece, and means connected with and projecting from the casing and adapted to contact with a portion of the instrument andoperating to cause the mouth piece to be wedged into said opening, when the mouth piece is fastoned to the transmitter.

3. The combination of a hollow body comprising separable sections having openings therethrough, a transmitter mouth piece passing through one of the openings from the inside of the section and with the receiving end of the mouth piece inside the section, means engaging the said body and a portion of the instrument and cooperating with the said mouth piece for holding the body in position, and an annular flange surrounding the other opening.

4. The combination of a hollow body comprising separable sections having openings thcrcthrough, a transmitter mouth piece passing through one of the openings from the inside of the section and with the receiving end of the mouth piece inside the section means engaging the said body and a portion of the instrument and cooperating with the said mouth piece for holding the body in position, an annular flange sur-,

rounding the other opening, and additional means for holding'the attachment 1n place.

5. Thccombination of a hollow body comprising separable sections having openings theretln-ou 'h a transmitter mouth lece passing through one of the openingsfrom the inside of the section and with the receiving end of the mouth piece inside the section, means engaging the said body and a portion of the instrument and coiiperating name to this specification, in the presence with the said mouth piece for holdingthe of two subscribing Witnesses, on this 4th body in position, an annular flange surday of September A. D. 1912.

rounding the pther opening, and a fastening EDMUND M. SGHOLLENBERGER. 5 Screw for asslstlng in holding the parts in Witnesses:

positlon. LEE A. STAHL,

In testimony whereof I have signed Iny J. H. JOGHUM, Jr. 

